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Vol.38, No.9, 1175 ~ 1187, 2000
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| Title |
| Wear and Fracture Properties of Hardfacing Alloys Reinforced with Complex Carbides |
| 추성훈Seong Hun Choo,김창규Chang Kyu Kim,어광준Kwang Jun Euh,이성학Sung Hak Lee,정재영Jae Young Jung,안상호Sang Ho Ahn |
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| Abstract |
| The present study aims to investigate the wear and fracture properties of the hardfacing alloys with a variation of volume fraction of complex carbides. The hardfacing alloys were deposited twice on a low-carbon steel place by a submerged arc welding method. In order to investigate the effect of complex carbides, different fractions of complex carbide powders included inside the hardfacing electrode were employed. As the volume fraction of complex carbides, particularly that of cuboidal carbides, increased, hardness and wear resistance increased. In-situ observation of fracture process showed that microcracks were initiated at complex carbides and that shear bands were formed between them, leading to ductile fracture. Hardness wear resistance, and fracture toughness were improved in hardfacing alloys reinforced with complex carbides in comparison with high-chromium white iron hardfacing alloys. This was mainly associated with the homogeneous distribution of fine complex carbides in the bainitic matrix. |
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